Piston-ring



O. W. ANDERSON PISTON RING.

APPLHZATION man APR. 18, 1917.

1,336,670. 1 Patented Api. 13, 1920.

UNITED STATES PATENT OFFICE.

OSCAR W. ANDERSON. 0F VALLEY CITY, NORTH DAKOTA.

PISTON-RING Specification of Letters Paianh Patented Apr. 13, 1920 Application filed Apai] 18v 1917 Swiu'! No 162.977.

The tendency of mmiwi'i limbs lF in in (crease tlw pressure in cylindersw ma l Light rings are of great llflpUTtfflliP. This ring is ili-sigsiul in wet this ill'llliiii l :mil i5 u distinct advance in the art.

A further Object of this hive-Minn pmaluvo split rings :iii'uiigml in pain: :mel

' iim'vl mizizm l'm M ing i'fildililil :iml new to prviuni Yi'llillni] iii um i0 he other: 'liirllwi'mwr ii: moan-a wlii'rvh; ilu' ll i1: :I l'lQ'l'll lnsuiv ()l' l.(ll prowl Hl'llilii will; :1 wall of a rylimiw and with ill-9 'mlvr, if [he grumv In pirltun in \ihi h lire ring: :iw plill'vil, even when ui'nplqiml in jammy. having high pressure.

Fiirthm'mm'e, :in nlijux'i iii the inn-mini! is in prmluve emu-ting rings wheruhy one of said rings IOlIlfOI("(-S the ntlwi" of tlw S2ll l rings and in which the tensii'm zuul pressure, is Pqmilizml throughout tho virvmnfmvnw n'f thu ring in m'ilvi' that (UHllK'TNvlll/lOfl will be lHHl luiwearing of iihv puris :iml tlm 1:01:1- pnsite ring will remain quivt zinil efl'uvtive.

ith iwlw Fm'vgxiing and other objects: in View. film lHWlltlUH annals in thv h inils nl' ('(HlShHi'tlOlln uml in tho zii'izirigviiiviil. and OlDllllHlfilOfl of parts: in he horuinaiter mow fully set forth and claimed.

In describing: the lllfilillfll. in (lllflil. 10f creme will lw hall hi (hi- :wmmpnnying drawings fm'ming pin-t ul' till?! sperifimtimi. herein like characters denote (*urrespunil" iiJrlh' prim:

ima wiilmne lill lliiigg 1mm whichhigunl illustrates a view in perspective ul' :1 pisznn win; i-mhmlying the invention; Fig. 2 illustrates a St'CtlUilfll view of a lmgiiwm. of :1 piston with a ring installed thviuim the ring being svctinnml. 4m t-hp line il--l (if Fl". 1; and

Fla; illilstl'aitvfi sc-vfimml View (in tlld' ling l -l f l"i :llw "mu Hug mmlv 1;] m" :111 outer 151M amyriil l m: mi; \lillt l'lFi l? (I, the i iiii 1? ma ring lain-1.: iw-i viuhl umnmiir in thv SUVUFlLl \VlUWS, and in hlll'fil 'v Ii ml the imam ring is ta wi'ed uplaps; and which 2 mvans of tin tension vxvrtvii hy lh-v hex-vied SHI'fJW'CS oi the two parts 0f ill! ring an h-(lil tngvthm under tllllfilizifii, PIFHSIU'Q.

'lhi- 25mm 5 um! (i an an manic: that they miipyi'air illkil are sprung into the. piston Qfl'iiiii't. m) sapling ur'tiun of the ring 6 lifllilr'; the surface I againsiz the surfacie of the cylimlma 'l hii ring 6 11: an placed with in the ring 5 that in greatest pui i f ten-- simn is at the weakest gmint (If maxim: 0f tliu ring 7n and H10 two rings living of uqiml iIIlHlHU. millpi'i'ulv with mirh other and pro llN'P gm vqiml tvns-iirm or pressure all around th 'limlvr Willi Tilt angle of the lmveleil surlmm Ziliil H and the iiHSlOil iii the ring 5 spmuls ilu rings laterally, making a tight closure with the walls I: and 5 of the annu lar groove. This construction produces not only a ti ht surf-are of the ring; with the Wall of I; e eylinder and of equal tension at all points around the eylinder but produces a constant tension, h reason of the bevel and tension of the inner ring. laterally, and holds it against the walls of the annular piston groove in \\'lll('ll the rim, lies, and thus produees tight and leak-proof closures at the surface as well as at the Sides of the ring. it lll lltlltfl prmides: a ring which will lIHYUltS entire aurlaee in Contact with the wall of the rylinder, and \vhirh can he perfectly maehined and prae ti 'ally produced. and proridea a ring that will not wedge in the cylinder; and l'urtlu-r provides a ring that antomativally spreads laterally and is held tight agaimt the walls of the annular piston proore. and \vhirh will remain uiet and tight.

The outer ring is lapp d to rompelnaite for wear and as the outri :airiare oi the ring ir gradually worn :nrav. thin manner of joining the outer ring will prodln'e a tight joint even after \war ath tension and herel oi the in ide ring \i ill tori-e the lower lap aggainat the upper lap and hold them together under pressure.

The fumttion ol the pinli is nimplr to prevent a rotation of th rings upon eat-h other and to so hold the rings in position as to make the tension oi. the ring at all points equal against the walls of the tiyllth (ler.

I claim- A piston ring uoin ti'iletion comprising an outer ring beveled in cross seetion and having a lapped joint. an inner ring having a lapped joint, a lot-king pin rigidly secured to the thiek portion of the outer ring, and projeeting into the primary slot of the lapped joint of the inner ring. and holding the rings in Hllt'll a manner as to prevent one from rotating upon the other, the outer ring having an outer t- \'lindrieal surfaee for making a tight; elonure against the wall of the eylinder with the entire surfaee of the ring, a primary side at right angles with the outer surface for making a tight clo- Sure with the wall oi the annular groove of the piston in which the ring lies, a seeondary side of less thielcneas than the primary side at right angles with the outer surfare to sernre the said ring from wedgin; hetween the piston and the eylilhlel and to preserve a uniform hearing anrtaee ol the ring with relation to the ovlimler, a hereled inner t \'ll1i(ltl' ring titted into and so eoiiperaling with the here] oi the out side ring! under tension a1-1 to press the outsid ring outward and laterally when the ring is planed in thannular groove 01' the pi to|i. therehy pressing the fares oi the lapped joint together under tension, where by the lateral presanre will hold the ifauen ol the, lap together under tension and prodin-e a leak-proof elosnre, the tension of the inner rin g a g'ainrt the herehal surl'aee ol the outer ring: automatis-ally taking up wear on the outer ring and holding the surfaces of the lapped joint together under tension and pressure.

OSCAR \V. ."\NI)ERS()N. 

